Creating graph with condition (dividing count by 5)

[#1]

Hi,

I am trying to create a graph with X -Axis = Category : C1 [15 count] , C2 [ 10 count] ; and Y-Axis = count

C1 split into 3 groups (or dots on the graph), and C2 into 2 groups.

(Arrived at groups based on the count divided by 5; 15/ 5 = 3 and 10/5 = 2)

Want to show 3 dots in C1, and 2 dots in C2 on the X-Axis. Please help!